On the day of publication both eBooks were priced at almost double the Hardcover price, both dropped to a much more realistic level later in the day.

Is this a case of price-gouging those who pre-order? Also my order from Germany to Amazon UK was blocked when I did the One-Click oder, with a message about buying from another county than the one I'm registered in
(I use multiple Amazon accounts to order from the US and UK as I require).
Went via a proxy, worked fine.